Bung for iron transport casks



Dec. 3, 1929. R. MAUSER 1,737,605

BUNG FOR IRON TRANSPORT CASKS Filed Nov. 28. 1928 Mauser l Patented Dec. 3, 1929 I UNITED, STATES PATENT OFFICE BUING 0R IRON TRANSPORT ons'xs Application filed- November 28, 1928 Serial No. 322,416, and in Germany September 23, 1927. I

This invention relatesto a hollow sheetembracing with its margin, which serves as a a packing surface, the collar of the screwthreaded portion, but this gives rise to the possibility of small quantitiesof the contents of the cask leaking into the interior of the hollow bun This however not merely in- ,volves a loss of the said contents but also leads to contamination ofthe bung, and this contamination will be increased if moisture canpenetrate into the interior of the bung through an aperture provided in the cover plate for a key.

' This ob 'ection is removed according to the present invention, by turriin the upper edge of the. screw-threaded portion of the bung over to form a sealing or packing flange which gripsthe cover plate. The cover plate is provided with a closed depression for the insertion of a key. v

When the cover plate is made in polygonal form the corners thereof may be so shaped as to form eyes for lead sealing purposes;

The invention is illustrated by way of exr ample in the accompanying drawings, where- 1n r packing flange 0 The peripheral portions f of the packing flange are bent round the outer edges of the cover plate d. At the corners of the cover'plate d are formed eyes 9 for lead sealing purposes, the peripheral portions of the flange 0 being formed with gaps at the positions of the said sealing eyes.

and the flange 0 What I claim is 1. Aihollow bung for iron transport casks, consisting of two pieces of sheet metal, one forming a polygonal top cover plate formed with eyes projecting at the 'corners for lead sealing purposes, and the other comprising a screw-threaded portion adapted to be screwed into the cask, and an outwardly turned packing flange at the upper end of the screw-threaded portion, the outer edge of the said flange being bent upwards and inwards round the edges ofthe cover plate.

' 2. A hollow bung for iron transport casks,

consisting of two pieces of sheet metal, oneforming a polygonal top cover plate formed with eyes projecting at the corners for lead sealing purposes, and with a closed non-circular depression adapted to engage with a key for the purpose of rotating the bung, and the other comprising a screw-threaded portion adapted to be screwed into the cask, and an outwardly turned packing flange at the upper end of the screw-threaded portion, the outer edge of the said flange being bent upwards apd inwards round the edges ofothe cover p ate. Y

3. A-hollow bung for iron transport casks, consisting of two pieces of sheet metal, one forming a; polygonal top cover plate formed with eyes projecting at the corners for" lead sealing purposesand with a closed oblong depression adapted to engage with a key for the purpose of rotating the bung, and the other comprising a screw-threaded portion adapted to be screwed into the cask, and an outwardly turned packing flange at the upper end of the screw-threaded portion, the outer edge of the said flange being bent upwards aiid inwards round the edges of the cover ate.

p In testimony whereof I have signed my name to this specification.

RUDOLF MAUSER. 

